MOSFET, BJT, and IGBT: Principles of Operation Transistors are among the most important components in modern electronics. They can be used to amplify electrical signals, switch currents, regulate power, and control other circuits. Although MOSFETs, BJTs, and IGBTs all perform similar basic functions, their internal structures and methods of control are quite different. The most important distinction is this: A BJT is primarily a current-controlled device. A MOSFET is primarily a voltage-controlled device. An IGBT is a voltage-controlled device that uses a bipolar conduction structure. Understanding this difference makes it much easier to decide which type of transistor is appropriate for a particular circuit. 1. The MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) A MOSFET is a field-effect ...
A practical, step-by-step tutorial on radio electronics for beginners and hobbyists. Created by an experienced instructor to help you master the basics and start building your own electronic devices easily.